Homer has many cases of this confusion; as πολεμίζω (πολεμιδ-) but πολεμίξω. In Doric the ξ forms from -ζω verbs are especially common, as χωρίζωseparate, χωριξῶ, ἐχώριξα. παίζωsport has (late) ἔπαιξα.